Process of producing fluid-conduits in castings.



J. F. CORVIN. PROCESS OF PRODUCING FLUID CONDUITS IN CASTINGS.

Patented July '31, 1917.

APPUCATKON FILED SEPT-15,1913- wa figmwm any ' sired smooth walls.

A CHIOAGO, ILLIDTOIS, A CORPORATION OF NEW JEBSE Y.

FBOOESSOF ZERODUCINYG FLUID-GONDUITS IN GASTING'S.

such as will enable others skilled in the to which-it appertains to make and use the same.

In lubricating systems and in various Specification of Letters Patent. Patented J My 31, Application filed September15, 1913. Serial No. 789,797.

-dicate like views.

other. differentdevices, it has long been the common practice to form oil or fluid conduits by boring long and frequently very small holes in castings forming part of the apparatus or device, These oil or fluid conduits often require a very complicated system of boring intersecting holes from various difierent points and at various different angles, and an elaborate plugging of certain of the holes. Frequently, also, it is desirable to extend-these tortuous conduits on such lines that they cannot possibly be may be produced by destructiblecores, but where conduits are of-small diameter, this is difiicult and often impossible. Furthermore the bored holes will not have'the de- My inventionfis directedto an extremely simple and efficient process for forming bored. Sometimes, these tortuous conduits these oil or fluid conduits exactly on de-' sired lines, whether simple or intricate and of the exact desired size, independently of the borin' operation and without the use of' destructib e temporary cores. The desired results are accomplished by the' use ofa; tube having the lines or form of the desired conduit, which tube-is cast into the casting in which the conduit is to be formed. This conduit forming tube should have a higher fusibility than-the casting in which it is embedded, and usually Would-be a seamless steel tube. It is placed in the wall and used after themanner of a core, but when the metal is cast around the same, it becomes a permanent integral part of the casting. When valves are to be used in connection with the conduit, valve seats may be formed by boring holes in the casting-which intersect and cutfth'rough the conduit forming tube at desired points.

The invention resides both in the process above stated, and in the product resulting from the process.

; Uni-TED sTA'rEs PATENT oFrm nuns rug convm, or cmcaeo, ILLINOIS, assrenon 'ro McOOBD AND comm, or

In the accompanying drawings which illustrate the invention, like characters inparts throughout the several Referring to the drawings:

Figure 1 is a sectional view showing a 1 casting with the conduit forming tube cast Into the same and with the cores applied to the projecting ends of the tube for the pose of supporting the tube in the sand durmg the process of molding; and

' Fig. 2 is a view corresponding to F 1,

but showing 'thecasting completed and formed with valve seats that intersect the; conduit and provided therein with valves for cooperation with the said conduit.

The. numeral 1 indicates a casting, which,

-in this particular instance, happens to be a casting of a type employed in certain lubricating systems,- notnecessary for the purposes of this case to particularly consider. The numeral 2 indicates a seamless steeltube bent into the form of the oil conduit which it is desired to form in the'said casting. The

said tube, as shown, having "several rectangu lar bends. The ends ofthe tube 2 are em-v bedded in tube anchors 3. Prior to forming the castingl intthe mold. rovided therefor, the tube 2 is supported a er the manner of:

a coreiwithin the mold cavity, by means of anchors 3 embedded in the sand in the well k'nown way. The molten material is then pored into the mold cavity and. all of that portion" ofthe conduit forming tube which.

is exposed within the mold-cavity, will be embedded within the casting and will be- 7 come apermanent integral part tlmreofa Fig." 1 shows the casting and tube as the would appear when taken from the 'mol and before the tube supporting cores 3 have been removed froin the projecting ends of a valve 4 is formed by' boring a hole 5 into Fig. 2 shows the. completed casting equipped withflvalves required for one particular purpose. By reference thereto, it will be noted that one valve seat for the ball of the elbows or angular bends of the tube 2.

The outer end of the hole 8 is closed by a plug 9. In the particular illustration given, also a hole constituting an,oil conduit'lO is bored into the casting 1 and through the intermediate portion of the tube 2. A Valveequipped bushing 11 is shown as screwed into the lower extremity of the conduit 10.

Also, as shown, the numeral 12 indicates a valve-equipped conduit bored into one end of the'casting l and opening into'the hole 5 of the said casting. This latter feature, however, constitutes no part of the present invention, and, in fact, it will be understood that the particular casting 'withvalves in the arrangement illustrated, has been described only for the purpose of illustrating one of the many ways in which my invention can be utilized.

20 ]?t is thought to be evident that by the use of the conduit forming tube cast into the body of the casting, it becomes a very easy matter to form accurate smooth walled con-' duits on any and all desired lines, and, in

fact, makes it an easy matter to form in the body of a tube in the cavity of a mold,

in casting the body of the casting around said tube, and in thereafter boring into said casting a hole that cuts into said tube and affords a valve seat or the like.

2. The process of constructing fluid conduits in castings, which consists in forming a tube to the desired contour of the conduit,

in applying a tube anchor to at least one end of said tube, in placing the-said tube in the cavity of the mold With the tube anchor embedded in the mold, and in casting the body of the casting around said tube, and in thereafter boring into the said casting, holes intersecting and severing the said tube to afford valve seats, or the like.

3'. The process of constructing tortuous fluid conduits in castings, which consists first in forming a tube to the contour of the desired conduit, in placing the said tube in the cavity of the mold, in casting the body of the casting around said tube, and in thereafter boring holes into said casting at points intersecting and cutting away angular portions of said tube to thereby afford valve seats or the like.

'In-testimonywhereof I aifix my signature in presence of two witnesses. I 1 JAMES F. CORVIN'.

Witnesses:

C. J. COPELAND,

DONALD D. MJLLIKIN. 

